Duplicate Images Clogging Council Property Files: What Officials and Experts Are Saying

Central Coast Council is under growing pressure to resolve a backlog of duplicated imagery embedded across its digital planning and asset management systems, a problem that officials and information management specialists say is slowing development approvals and inflating storage costs at a time when the organisation can least afford inefficiency.

The issue has come into sharper focus during the current phase of the council's post-administration financial recovery, which began after the NSW Government placed the council under administration in October 2020. Cleaning up digital records — including duplicate cadastral maps, flood imagery, and site inspection photographs stored across multiple platforms — has become a line item in the council's broader IT remediation work, according to documentation tabled at recent ordinary council meetings held at 2 Hely Street, Wyong.

Why It Matters for Planning and Approvals

Duplicate image files create concrete problems for planners processing development applications. When the same aerial photograph of, say, a Gosford CBD block appears under multiple file names or in separate system folders, staff must manually reconcile versions before sign-off. That slows turnaround on DAs at exactly the moment the council is trying to accelerate Gosford's renewal agenda, which centres on the precinct around Mann Street and the former Gosford courthouse site.

Information governance professionals who work with NSW local government bodies say the problem is not unique to the Central Coast. Local councils that migrated from legacy systems to platforms such as Pathway or TechnologyOne during rapid digitalisation phases — many doing so between 2015 and 2020 — routinely carried duplicate records across. The Central Coast's administration period added complexity: different interim management teams applied inconsistent naming conventions, leaving asset registers with redundant imagery attached to the same property parcels.

Central Coast Council's current digital records framework falls under its Information and Communications Technology Strategy, a document the council adopted as part of its post-administration Improvement Plan. The strategy identifies data deduplication as a medium-term priority, though no public deadline has been set for completing the imagery audit across all property files.

Costs, Tools and the Path Forward

Storage is not a trivial expense. Enterprise cloud storage for local government in NSW typically runs between $8,000 and $25,000 per terabyte annually depending on redundancy and compliance requirements, according to publicly available NSW Government ICT pricing frameworks. A council managing tens of thousands of property records — Central Coast has roughly 140,000 rateable properties — can accumulate substantial redundant data over a decade of inconsistent file management.

Several NSW councils have turned to automated deduplication tools that scan for identical or near-identical image hashes and flag them for human review before deletion. The process requires sign-off from records management officers to ensure nothing is removed that might be needed for heritage listings, flood mapping, or legal proceedings. For the Central Coast, properties in flood-prone areas such as parts of Tuggerah, Chittaway Bay, and the flats near Kanwal Road carry imagery that intersects with the council's climate resilience planning work, making the review more complex than a simple delete-and-move-on exercise.

Specialists in the field generally advise councils to complete a full audit before touching any files, establish a single source-of-truth repository, and then set automated rules preventing future duplication at the point of upload. That sequence typically takes between six and eighteen months for a council of Central Coast's size.

For ratepayers and developers waiting on approvals in suburbs stretching from Terrigal to Woy Woy, the practical upshot is straightforward: the faster the council resolves its data housekeeping, the faster its planning staff can process applications without chasing down which version of a site photograph is the authoritative one. The council's next quarterly performance report, expected to be presented at the Wyong chambers in September 2026, is likely to include updated metrics on DA processing times — and those numbers will, in part, reflect whether the image cleanup work is gaining traction.